South Pacific, Vailulu’u
This submarine volcano is located in the Samoa Islands. Vaululu'u has a height of about 4200 meters from the sea bed and has a summit depth of 590 m as it extends more than 33 km at its base.
Image Courtesy: celebrating200years.noaa.gov
This cone like volcano has been discovered in 2010 and is situated in the North Pacific ocean on the Sangihe Arc near Indonesia. It has a height of about 3800 meters on the sea bed.
Image Courtesy: glaswerkz.com
This volcano lies in the Pacific Ocean near the southeast of Hawaii. Its height is 3000 meters above the ocean bed with a summit depth of 975 meters. This volcano is also called the youngest volcano and is actually a mountain in the ocean. It first erupted in 1996.
Image Courtesy: weirdlyodd.com
Mt. Marsili, Europe
This Italian volcano is located in the Tyrrhenian Sea and is the largest one in Europe. The height of this volcano is 3000m and is 43 miles long with a width of 19 miles. It has been researched for a long time and now the scientists are of the view that this volcano can erupt at anytime. The walls of this volcano are very fragile and it can produce large tides in the sea which can go all the way to Italy.
Image Courtesy: energia.gr
Barren Island, Andaman Sea
This active underwater volcano is located in the Andaman Sea. The height is 2240 m on the sea bed. In 1787, this volcano erupted for the first time and has erupted six times since then.
Image Courtesy: volcano.si.edu
Kick 'em Jenny, Grenada
This volcano is located in the Caribbean Sea towards the north of Grenada. It has a height of 1300 m and a summit depth of -180 m (180 meters under the sea surface). This volcano first erupted in 1939 and in 2001. Since this volcano is active, it is expected to erupt again in the future.
Image Courtesy: repeatingislands.com
Brothers Volcano, New Zealand
Located in New Zealand, this dormant Volcano is a part of Karmadec Arc. This circular volcano has a diameter of 7–9 km and has a height of 900 m on the sea bed. It's depth is 1350 meters.
Image Courtesy: environmentalgraffiti.com
Aleutian Islands, Alaska
Located in Aleutian Islands in Alaska, this volcano has a height of 580 meters. Although it has been declared dormant but still scientists believe that it can erupt anytime as it is a very unpredictable volcano.
Image Courtesy: earthobservatory.nasa.gov
This underwater volcano is located in the Aegan Sea in the North Eastern part of Cape Kolumbo in Greece. Its height is of about 300 m on the sea bed. This oval shaped volcano goes 8km along its own axis. Although this volcano is active but it has been silent for a long time.
Image Courtesy: geotimes.org
Rumble III Volcano:
This underwater volcano is located on the Kermadec Arc on the Northern coast of New Zealand. The elevation of this volcano is 140 meters.
Image Courtesy: thehivedaily.com